1999-2002 Chevrolet Silverado 2500 & GMC Sierra 2500 with 6.0L engine - Non HD models. - Aggressive sound
1999-2004 Ford F-250, F-350 trucks Super Duty chassis with a V8 or V10 engine. - Moderate to mild sound
1999-2004 Ford Mustang GT, MACH1 and Bullitt with 4.6L SOHC engine, Stainless Steel - Aggressive to moderate sound
1999-2004 Ford Mustang LX with 3.8L engine. - Moderate sound
1999-2007* (*2007 Classic Only) Chevrolet Silverado, GMC Sierra 1500 with 4.8L or 5.3L engine - Aggressive sound
1999-2007* (*Classic body only) Chevrolet and GMC 1500 with a 4.3L, 4.8L or 5.3L engine. - Mild sound
1999-2007* (*Classic body Only) Chevrolet Silverado/GMC Sierra 1500 4.3L, 4.8L, 5.3L engine, Standard Cab/Short Bed. Stainless Steel - Aggressive to moderate sound
1999-2007* (*Classic Body Only) Chevrolet Silverado/GMC Sierra 1500 with 4.3L, 4.8L or 5.3L engine. - Mild sound
1999-2007* (*Classic body only) Chevrolet Silverado/GMC Sierra 1500 with 4.3L, 4.8L, 5.3L engines. Aluminized Steel - Aggressive to moderate sound
1999-2007* (*Classic body) Chevrolet/GMC 1500 with a 4.3L, 4.8L or 5.3L engine. - Mild sound
1999-2007* (2007 Classic Only) Chevrolet Silverado, GMC Sierra 1500 4.3L, 4.8L, 5.3L engine, Extended Cab/Short Bed. Stainless Steel - Aggressive to moderate sound
1999-2007* Chevrolet Silverado, GMC Sierra 1500 4.3L, 4.8L, 5.3L engine. Aluminized Steel - Aggressive to moderate sound
